code: def __init__(
      self,
      *,
      region: str,
      effective_start_date: int,
      effective_end_date: Optional[int],
      sku: str,
  ):
      self.region = region
      self.effective_start_date = effective_start_date
      self.effective_end_date = effective_end_date
      self.sku = sku
  
file_path: hail/batch/batch/driver/pricing.py
imports: import abc
  from typing import Optional
  from hailtop.utils import time_msecs
label_desc: Use image node_id 1 to create a new Price object from inherited base classes: abc with example: obj = Price()